TEHRAN, October 7. /TASS/. Iran's supreme leader Ayatollah Ali Khamenei said on Wednesday Tehran should have no talks with the US as they yield no benefit.

"The path towards talks with the United States is closed as last time the result of these negotiations was only disappointment and they brought no benefit," said Khamenei, who has not publicly backed the nuclear deal reached with the world powers in mid-July.

"Our talks with the US always turn to be America’s attempt to harm the Islamic Republic," he said.

At the lengthy nuclear talks even when it seemed that the ways of solving the problem were found, Washington always "searched for a chance to pressure Iran and make us take a step at the expense of national interests," he said.

"The US always conducts talks from the position of imposing its will," the supreme leader stressed.

On 14 July 2015, the P5+1 group of international mediators (five permanent members of UN Security Council - US, UK, Russia, China, France - and Germany) and Iran signed the Joint Comprehensive Plan of Action on Tehran’s nuclear program. Iran will not produce weapons-grade plutonium and limit its stockpile of uranium enriched to 3.67% to 300 kilograms for the next 15 years. Tehran also agreed to modernize its nuclear facilities and use them for exclusively peaceful purposes.

Sanctions will be gradually removed from Iran. The arms embargo imposed by UN Security Council will be kept in place for five years, ban for supplying ballistic missile technologies to Iran - for eight years. Experts from the International Atomic Energy Agency (IAEA) will monitor nuclear facilities in Iran for the next 25 years. If any points of the agreement are violated by Iran, sanctions against the country will be renewed.

On July 20, the corresponding resolution on Iran’s nuclear program agreement was adopted by UN Security Council.